3. What is computer?
A computer is an electronic device that manipulates
information, or data. It has the ability to store, retrieve, and
process data. You may already know that you can use
a computer to type documents, send email, play games, and
browse the Web.
4. computer
A computer is an electronic device, that can accept
data (input), process the data ( Processing) and
gives us meaningful Information (output), and store
the information for future use.
11. The input devices of
a computer are used to input the
user data or information
into computers for output results.
The common examples are
Keyboard, Mouse, Joystick,
Trackball, Digital Camera,
Scanner, Bar code Reader, OCR,
Biometric Sensor and Microphone.
12. An output device is any piece
of computer hardware equipment
which converts information into
human readable form. It can be text,
graphics, tactile, audio, and video.
Some of the output devices are Visual
Display Units (VDU) i.e. a Monitor,
Printer graphic Output devices,
Plotters, Speakers etc.